Need build critique!

I have this posted in the Shadow section, but i thought it would be worth asking people who play scions alot, as it can easily be played on a scion as well.

The point of this build is to get a ton of frenzy charges for really good attack speed, using an elemental weapon with spectral throw. It is sort of a spin-off of the elemental buzzsaw build. All the nodes I have taken I would like to keep, but I am open to suggestions. The main area I need critique in is grabbing said nodes efficiently without wasting extra points (which I feel like I am doing). This is the biggest concern in the large area between the shadow and ranger regions. Any help would be much appreciated. Thanks!